Towards the end of January the surviving envoys, L. Piso and L. Philippus (S. Servilius having died), returned from their mission to Antonius.

S. could stand for Sextus or Spurius, although Sex. and Sp. are the usual abbreviations for those praenomina. But the three envoys to Antonius were L. Calpurnius Piso Caesoninus, L. Marcius Philippus, and Ser. Sulpicius Rufus. "S. Servilius" here is a mistake.

There is now a new translation of Cicero's Philippics in the Loeb Classical Library, by D.R. Shackleton Bailey, 2 vols. (2009). In his introduction to the eighth Philippic (vol. II, p. 30), Shackleton Bailey names the envoys correctly.